<form action="" method="post" id="forma">
<input type="button" value="移出" id="it" />
</form>
<script>
var it = document.getElementById('it');
// abc.onlick = function() {
// alert(1);
// }
//console.log(typeof(it));
it.onclick = function() {
alert(1);
}
it.addEventListener('click', function() {
alert(1);
})
</script>
因为 type="submit" 本身就提交一个事件,所以 改为 type="button"